BAY POINT -- The man who was killed when he drove his motorcycle into the back of a box truck on Highway 4 Wednesday has been identified as 44-year-old Concord resident Timothy Rouvinen.

The wreck was just before the eastbound San Marco Boulevard exit at about 1:25 p.m. CHP initially reported the wreck actually occurred closer to Bailey Road, but it took nearly half a mile for the truck driver to pull over because other cars were in front of him, CHP spokesman John Fransen said.

Though the investigation into the crash is still ongoing, an early CHP report indicated that Rouvinen was driving at a fast speed when he tried to change from the No. 2 lane to the No. 4 lane and collided with the back of the truck, Fransen said Wednesday.

The truck driver, who was not injured, was not cited in the incident, officials said.

CHP is still trying to determine if drugs or alcohol were a factor in the collision.